600w HPS Cool Tube in 5 gal DWC SCROG. CO2, Nirvana White Widow, GH nutes on Lucas. I have only 6'2" of Vertical Space to work with. Is this going to be enough? Its gonna have to be. The buckets are 14 inches tall, and the light is about a foot diameter once hung. That leaves only 4 feet of growing space. How many inches should I have the screen off the buckets and how tall should I flower?